Expressed in Standard Powers-Of-10 Notation and Rounded to Four Significant $\times$

Multiple Choice

Expressed in standard powers-of-10 notation and rounded to four significant figures, the number 0.00023648 is

A) 2.364 $\times$ 10³.
B) 2.365 $\times$ 10⁴.
C) 2.365 $\times$ 10^-4.
D) 236.4 $\times$ 10^-6.